.logo {
    height: 28px;
    background: url("../assets/logo.svg") no-repeat center center;
    margin: 16px;
}

.overlay {
    overflow: auto;
    background-color: #fff;
    width: 100%;
    height: 100vh;
    position: fixed;
    padding-top: 200px;
    text-align: center;
    z-index: 999
}

.sider {
  overflow: auto;
  height: 100vh;
  position: fixed;
  left: 0;
}

.clearfix {
    zoom: 1;
}

.clearfix:before,
.clearfix:after {
    content: '';
    display: table;
}

.clearfix:after {
    clear: both;
}
